The SMM665B is an Active DC Output power supply
Controller (ADOCTM) that monitors, margins and
cascade sequences. The ADOC feature is unique and
maintains extremely accurate settings of system
supply voltages to within 0.2% under full load. The
device actively controls up to six DC/DC converters
that use a Trim or Regulator VADJ/FB pin to adjust the
output voltage. For system test, the part also controls
margining of the supplies using I
2
C commands. It CAN
margin supplies with either positive or negative control
within a range of 0.3V to VDD depending on the
specified range of the converter. The SMM665B also
intelligently sequences or cascades the power
supplies on and off in any order using enable outputs
with programmable polarity. It CAN operate off any
intermediate bus supply ranging from 8V to 15V or
from 5.5V to as low as 2.7V. The part monitors six
power supply channels as well as VDD, 12V input, two
general-purpose Analog inputs and an internal
Temperature Sensor using a 10-bit ADC The 10-bit
ADCCAN measure the value on any one of the monitor
channels and output the data via the I
2
C bus. A host
system CAN communicate with the SMM665B status
Register optionally control Power-on/off, margining and
utilize 4K-bits of nonvolatile memory. By SUMMIT Microelectronics, Inc: